Spurious precision? Meta-analysis of observational studies.
Egger
M
M
Department of Social Medicine, University of Bristol. m.egger@bristol.ac.uk
Schneider
M
M
Davey Smith
G
G
D000704:Analysis of Variance; D015982:Bias; D015986:Confounding Factors, Epidemiologic; D015201:Meta-Analysis as Topic; D016032:Randomized Controlled Trials as Topic